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Thread: Spark plugs

  1. #1
    Join Date
    Jun 2012
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    Carrizo Springs Tx.
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    53

    Spark plugs

    I had some oem spark plugs, they were fine then I bought some ngk tr55 part number 3951.. And gapped them to 40 and when stomp on it from a dead stop it's super sluggish. Then it's pulls after.

    But with oem plugs it would bark 35s just alittle.

    With tr55 at 40 gap it would not.

    Should I gap higher
    Mods: CAI,Magnaflow Exhaust, Calspeed LTs & ORY, Airaid TBS, Vette Servo, Nelson Performance Tune

    Future Mods: 4.56 gears , 212/218 cam, stall converter and 100-150 shot, Rebuilt tranny.

  2. #2
    Join Date
    Nov 2007
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    THE MEAN STREETS OF OKLAHOMA
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    why are you gapping them ?
    THEY CALL ME G.

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  3. #3
    Join Date
    Aug 2007
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    Honeywood, Ontario
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    7,112
    Factory gap is .060. Only need to close that up for n2o or boost.
    2006 Silverado
    Little Black Bitch

  4. #4
    Join Date
    Mar 2010
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    San Antonio, Tx
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    356
    TR55 are pre gapped should be .060, leave it there!. The OEM Iridium plugs have .040 gap. Any non-iridium plug needs to be .060 unless different cylinder pressure
    than stock.
    2002 ECSB 2WD 5.3
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    Most sports require one ball, motocross requires two.

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  5. #5
    Join Date
    Apr 2012
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    LaVista Ne.
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    What gap if different than stock cylinder pressure?

  6. #6
    X2 on not adjusting the gap.

  7. #7
    Join Date
    Nov 2009
    Location
    SAN ANTONE
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    784
    i would set the gap to .045-.050 with a tr55 plug
    06 rcsb, 6two, 231/235, 4.11, pacesetter, 80e, 14 bolt, Nelson tuned
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